Dear A Series owners, really need your kind help identifying a piece please

Is this normal for a 26A? or any of the other A series???
or perhaps the case has been changed?
Caseback OP6504 and dial looks right?
Your kind views will be very much appreciated
Thank you so much all...
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This is a 26K pic (My apologies for the borrowed pic since I don't know who owns it)
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